For the legacy

client/client.go

@@ -38,7 +38,9 @@ type Message interface {
 type Request interface {
 	// The service to call
 	Service() string
-	// The endpoint to call
+	// The action to take
+	Method() string
+	// The endpoint to invoke
 	Endpoint() string
 	// The content type
 	ContentType() string

client/rpc_codec.go

@@ -104,6 +104,7 @@ func (c *rpcCodec) Write(m *codec.Message, body interface{}) error {
 	// set the mucp headers
 	m.Header["X-Micro-Id"] = m.Id
 	m.Header["X-Micro-Service"] = m.Target
+	m.Header["X-Micro-Method"] = m.Method
 	m.Header["X-Micro-Endpoint"] = m.Endpoint
 
 	// if body is bytes Frame don't encode
@@ -154,6 +155,7 @@ func (c *rpcCodec) ReadHeader(wm *codec.Message, r codec.MessageType) error {
 	// read header
 	err := c.codec.ReadHeader(&me, r)
 	wm.Endpoint = me.Endpoint
+	wm.Method = me.Method
 	wm.Id = me.Id
 	wm.Error = me.Error
 
@@ -162,11 +164,16 @@ func (c *rpcCodec) ReadHeader(wm *codec.Message, r codec.MessageType) error {
 		wm.Error = me.Header["X-Micro-Error"]
 	}
 
-	// check method in header
+	// check endpoint in header
 	if len(me.Endpoint) == 0 {
 		wm.Endpoint = me.Header["X-Micro-Endpoint"]
 	}
 
+	// check method in header
+	if len(me.Method) == 0 {
+		wm.Method = me.Header["X-Micro-Method"]
+	}
+
 	if len(me.Id) == 0 {
 		wm.Id = me.Header["X-Micro-Id"]
 	}

client/rpc_request.go

@@ -6,6 +6,7 @@ import (
 
 type rpcRequest struct {
 	service     string
+	method	string
 	endpoint    string
 	contentType string
 	codec       codec.Codec
@@ -27,6 +28,7 @@ func newRequest(service, endpoint string, request interface{}, contentType strin
 
 	return &rpcRequest{
 		service:     service,
+		method: endpoint,
 		endpoint:    endpoint,
 		body:        request,
 		contentType: contentType,
@@ -42,6 +44,10 @@ func (r *rpcRequest) Service() string {
 	return r.service
 }
 
+func (r *rpcRequest) Method() string {
+	return r.method
+}
+
 func (r *rpcRequest) Endpoint() string {
 	return r.endpoint
 }

client/rpc_stream.go

@@ -53,6 +53,7 @@ func (r *rpcStream) Send(msg interface{}) error {
 	req := codec.Message{
 		Id:       r.id,
 		Target:   r.request.Service(),
+		Method: r.request.Method(),
 		Endpoint: r.request.Endpoint(),
 		Type:     codec.Request,
 	}

codec/codec.go

@@ -53,6 +53,7 @@ type Message struct {
 	Id       string
 	Type     MessageType
 	Target   string
+	Method   string
 	Endpoint string
 	Error    string
 

codec/jsonrpc/client.go

@@ -45,9 +45,9 @@ func newClientCodec(conn io.ReadWriteCloser) *clientCodec {
 
 func (c *clientCodec) Write(m *codec.Message, b interface{}) error {
 	c.Lock()
-	c.pending[m.Id] = m.Endpoint
+	c.pending[m.Id] = m.Method
 	c.Unlock()
-	c.req.Method = m.Endpoint
+	c.req.Method = m.Method
 	c.req.Params[0] = b
 	c.req.ID = m.Id
 	return c.enc.Encode(&c.req)
@@ -66,7 +66,7 @@ func (c *clientCodec) ReadHeader(m *codec.Message) error {
 	}
 
 	c.Lock()
-	m.Endpoint = c.pending[c.resp.ID]
+	m.Method = c.pending[c.resp.ID]
 	delete(c.pending, c.resp.ID)
 	c.Unlock()
 

codec/jsonrpc/server.go

@@ -53,7 +53,7 @@ func (c *serverCodec) ReadHeader(m *codec.Message) error {
 	if err := c.dec.Decode(&c.req); err != nil {
 		return err
 	}
-	m.Endpoint = c.req.Method
+	m.Method = c.req.Method
 	m.Id = fmt.Sprintf("%v", c.req.ID)
 	c.req.ID = nil
 	return nil

codec/protorpc/protorpc.go

@@ -47,7 +47,7 @@ func (c *protoCodec) Write(m *codec.Message, b interface{}) error {
 		c.Lock()
 		defer c.Unlock()
 		// This is protobuf, of course we copy it.
-		pbr := &Request{ServiceMethod: &m.Endpoint, Seq: id(m.Id)}
+		pbr := &Request{ServiceMethod: &m.Method, Seq: id(m.Id)}
 		data, err := proto.Marshal(pbr)
 		if err != nil {
 			return err
@@ -73,7 +73,7 @@ func (c *protoCodec) Write(m *codec.Message, b interface{}) error {
 	case codec.Response, codec.Error:
 		c.Lock()
 		defer c.Unlock()
-		rtmp := &Response{ServiceMethod: &m.Endpoint, Seq: id(m.Id), Error: &m.Error}
+		rtmp := &Response{ServiceMethod: &m.Method, Seq: id(m.Id), Error: &m.Error}
 		data, err := proto.Marshal(rtmp)
 		if err != nil {
 			return err
@@ -126,7 +126,7 @@ func (c *protoCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
 		if err != nil {
 			return err
 		}
-		m.Endpoint = rtmp.GetServiceMethod()
+		m.Method = rtmp.GetServiceMethod()
 		m.Id = fmt.Sprintf("%d", rtmp.GetSeq())
 	case codec.Response:
 		data, err := ReadNetString(c.rwc)
@@ -138,7 +138,7 @@ func (c *protoCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
 		if err != nil {
 			return err
 		}
-		m.Endpoint = rtmp.GetServiceMethod()
+		m.Method = rtmp.GetServiceMethod()
 		m.Id = fmt.Sprintf("%d", rtmp.GetSeq())
 		m.Error = rtmp.GetError()
 	case codec.Publication:

server/rpc_codec.go

@@ -41,6 +41,15 @@ var (
 		"application/proto-rpc":    protorpc.NewCodec,
 		"application/octet-stream": raw.NewCodec,
 	}
+
+	// TODO: remove legacy codec list
+	defaultCodecs = map[string]codec.NewCodec{
+		"application/json":         jsonrpc.NewCodec,
+		"application/json-rpc":     jsonrpc.NewCodec,
+		"application/protobuf":     protorpc.NewCodec,
+		"application/proto-rpc":    protorpc.NewCodec,
+		"application/octet-stream": protorpc.NewCodec,
+	}
 )
 
 func (rwc *readWriteCloser) Read(p []byte) (n int, err error) {
@@ -57,6 +66,33 @@ func (rwc *readWriteCloser) Close() error {
 	return nil
 }
 
+// setupProtocol sets up the old protocol
+func setupProtocol(msg *transport.Message) codec.NewCodec {
+	// if the protocol exists do nothing
+	if len(msg.Header["X-Micro-Protocol"]) > 0 {
+		return nil
+	}
+
+	// if 0.17 - 0.21
+	if len(msg.Header["X-Micro-Service"]) > 0 {
+		// set method to endpoint
+		if len(msg.Header["X-Micro-Method"]) == 0 {
+			msg.Header["X-Micro-Method"] = msg.Header["X-Micro-Endpoint"]
+		}
+
+		// set endpoint to method
+		if len(msg.Header["X-Micro-Endpoint"]) == 0 {
+			msg.Header["X-Micro-Endpoint"] = msg.Header["X-Micro-Method"]
+		}
+
+		// done
+		return nil
+	}
+
+	// old ways
+	return defaultCodecs[msg.Header["Content-Type"]]
+}
+
 func newRpcCodec(req *transport.Message, socket transport.Socket, c codec.NewCodec) codec.Codec {
 	rwc := &readWriteCloser{
 		rbuf: bytes.NewBuffer(req.Body),
@@ -109,6 +145,7 @@ func (c *rpcCodec) ReadHeader(r *codec.Message, t codec.MessageType) error {
 
 	// set some internal things
 	m.Target = m.Header["X-Micro-Service"]
+	m.Method = m.Header["X-Micro-Method"]
 	m.Endpoint = m.Header["X-Micro-Endpoint"]
 	m.Id = m.Header["X-Micro-Id"]
 
@@ -141,6 +178,8 @@ func (c *rpcCodec) Write(r *codec.Message, b interface{}) error {
 
 	// create a new message
 	m := &codec.Message{
+		Target:   r.Target,
+		Method:   r.Method,
 		Endpoint: r.Endpoint,
 		Id:       r.Id,
 		Error:    r.Error,
@@ -162,6 +201,11 @@ func (c *rpcCodec) Write(r *codec.Message, b interface{}) error {
 		m.Header["X-Micro-Service"] = r.Target
 	}
 
+	// set request method
+	if len(r.Method) > 0 {
+		m.Header["X-Micro-Method"] = r.Method
+	}
+
 	// set request endpoint
 	if len(r.Endpoint) > 0 {
 		m.Header["X-Micro-Endpoint"] = r.Endpoint

server/rpc_request.go

@@ -7,6 +7,7 @@ import (
 
 type rpcRequest struct {
 	service     string
+	method      string
 	endpoint    string
 	contentType string
 	socket      transport.Socket
@@ -34,6 +35,10 @@ func (r *rpcRequest) Service() string {
 	return r.service
 }
 
+func (r *rpcRequest) Method() string {
+	return r.method
+}
+
 func (r *rpcRequest) Endpoint() string {
 	return r.endpoint
 }

server/rpc_router.go

@@ -189,6 +189,7 @@ func (s *service) call(ctx context.Context, router *router, sending *sync.Mutex,
 	r := &rpcRequest{
 		service:     req.msg.Target,
 		contentType: req.msg.Header["Content-Type"],
+		method:      req.msg.Method,
 		endpoint:    req.msg.Endpoint,
 		body:        req.msg.Body,
 	}

server/rpc_server.go

@@ -97,9 +97,14 @@ func (s *rpcServer) ServeConn(sock transport.Socket) {
 			ct = DefaultContentType
 		}
 
+		// setup old protocol
+		cf := setupProtocol(&msg)
+
+		// no old codec
+		if cf == nil {
 			// TODO: needs better error handling
-		cf, err := s.newCodec(ct)
+			var err error
-		if err != nil {
+			if cf, err = s.newCodec(ct); err != nil {
 				sock.Send(&transport.Message{
 					Header: map[string]string{
 						"Content-Type": "text/plain",
@@ -109,12 +114,14 @@ func (s *rpcServer) ServeConn(sock transport.Socket) {
 				s.wg.Done()
 				return
 			}
+		}
 
 		rcodec := newRpcCodec(&msg, sock, cf)
 
 		// internal request
 		request := &rpcRequest{
 			service:     msg.Header["X-Micro-Service"],
+			method:      msg.Header["X-Micro-Method"],
 			endpoint:    msg.Header["X-Micro-Endpoint"],
 			contentType: ct,
 			codec:       rcodec,

server/rpc_stream.go

@@ -31,6 +31,8 @@ func (r *rpcStream) Send(msg interface{}) error {
 	defer r.Unlock()
 
 	resp := codec.Message{
+		Target:   r.request.Service(),
+		Method:   r.request.Method(),
 		Endpoint: r.request.Endpoint(),
 		Id:       r.id,
 		Type:     codec.Response,

server/server.go

@@ -45,6 +45,8 @@ type Message interface {
 type Request interface {
 	// Service name requested
 	Service() string
+	// The action requested
+	Method() string
 	// Endpoint name requested
 	Endpoint() string
 	// Content type provided